Enhanced Visible-light-driven Photocatalytic Performance of In2O3-loaded TiO2 Nanocubes with Exposed (001) Facet

摘要

The heterostructures of In2O3 nanoparticle loaded on anatase TiO2 nanocube with exposed (001) facet (In2O3/TiO2-nanocube) were fabricated via a two-step hydrothermal process.The crystal phase,morphology,micro-structure and photo-absorption property of the products were characterized by FESEM,TEM,XR.D,and UV-Vis diffuse reflectance spectroscopy.The results showed that the percentage of exposed (001) facet ofTiO2 nanocube was about 33％.In2O3 nanoparticles were successfully decorated on the surface ofTiO2 nanocube to form the In2O3/TiO2 heterojunction.Photocurrent measurements confirmed that (001) faceted surface was advantageous for the charge carrier migration and separation in the composites.In comparison with bare TiO2 nanocube and In2O3/TiO2-nanoparticle,the In2O3/TiO2-nanocube heterostructures exhibited enhanced activity toward the degradation of rhodamine B and tetracycline under visible light irradiation,which was attributed to the synergic effect of In2O3/TiO2 heterojunction and the exposure of (001) facet.